We are the national largest manufacturer of IP network internal communication intercom system! SPON Communication Technology Co., Ltd, has been a high-tech enterprise specialized in R&D for the digital network audio products, manufacturing equipment and system integration for many years. The headquarters is located in the Changsha national high-tech development zone, with the branches in Toronto (Canada), Beijing, Shanghai, Shenzhen, Xian and Kunming etc. We are the guider of Chinese IP ...   |